js/css dynamically loads JS plug-ins
This time I will bring you js/css dynamic loading JS plug-in, what are the precautions for making js/css dynamic loading JS plug-in , the following is a practical case, let's take a look.
JavaScript to create nodesAdd to body or head
Add js code:
var n = document.createElement("script");
n.setAttribute("type", "text/javascript");
n.setAttribute("src", i);document.body.appendChild(n);
document.head.appendChild(n);Write a code to dynamically add node js:
/*
es6 中 函数设置默认参数可以使用 例:function 函数名(变量= 默认值) {...}
如果想要兼容可以使用 例:function 函数名(变量) {if(变量==undefined){变量= 默认值}....}
*/function cr_node(i, l = "body") { //创建节点并添加
t = i.split(".").reverse()[0];//获取后缀
var n = null; if (t == "js") {//后缀判断
n = document.createElement("script");
n.setAttribute("type", "text/javascript");
n.setAttribute("src", i);
} else if (t == "css") {
n = document.createElement("link");
n.setAttribute("rel", "stylesheet");
n.setAttribute("href", i);
} if (n != null) { if (l == "body") { document.body.appendChild(n);
} else if (l == "head") { document.head.appendChild(n);
} else {
l.appendChild(n);
}
} return n;
}//添加bootstrap样式cr_node("http://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css","head")//默认添加jquery到<body>...</body>cr_node("http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js");//添加jquery到<head>...</head>cr_node("http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js","head");//添加jquery到<div id="id">...</div>cr_node("http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js",document.getElementById("id"))2. Add binding event function
Add a single node and bind the event
function cr_node(i, l = "body") {....}function addNode(o, c = undefined) { //单个添加
var n = null; if(typeof(o) == "object") {
n = cr_node(o.src, (o.parent ? o.parent : "body")); if(typeof(o.load) == "function") {
n.onload = o.load; //绑定加载事件
} if(typeof(o.err) == "function") {
n.onerror = o.err; //绑定错误事件
}
} else if(typeof(o) == "string") {
n = cr_node(o); //直接添加节点
if(typeof(c) == "function") {
n.onerror = n.onload = c; //绑定加载事件
}
}
}Use Instructions:
//直接使用addNode("http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js",function(){...});//完整使用addNode({ "src": "http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js", "load": function() { console.log("加载成功"); console.log($("body").html());
}, "err":function() { console.log("加载失败");
}, "parent": document.getElementById("id")//不写默认是body})3. Try to write a batch adding function
If you only want to add, you can use the following function:
function addNodes(o, index = 0) { //多个添加
if (o.src.length > index && typeof(o.src) == "object" && o.src.length > 0) { var n = cr_node(o.src[index], o.parent); if (o.src.length - 1 == index && typeof(o.load) == "function") {
n.onerror = n.onload = o.load;
} else {
n.onerror = n.onload = function() {
addNodes(o, index + 1);
}
}
}
}Usage example:
addNodes({ "src":["http://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.css","http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js","http://cdn.bootcss.com/jquery-cookie/1.4.1/jquery.cookie.min.js","http://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"],"parent":"head",
"load":function(){ console.log(1111); console.log($("body").html());
}
})I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
Related reading:
How to use s-xlsx to import and export Excel files
How to use JavaScript to save text data
Browser file segmented breakpoint upload
The above is the detailed content of js/css dynamically loads JS plug-ins. For more information, please follow other related articles on the PHP Chinese website!
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